Blood spots about the size of a pencil tip on mattress or linens
Small black dirt specks (bed bug feces) in seams, cracks or crevices of beds and furniture
Small whitish casing in seams, cracks or crevices of beds and furniture
Actual bugs present (bed bugs are small and flat, about the size of a common wood tick)
Unexplained rash on your body. Bed bug bites resemble mosquito and flea bites and tend to appear in a straight line